DEM construction from raw LIDAR data

Hello,

I'm trying to construct DEMs from raw LIDAR data (point clouds). I
need the algorithm. Where can I find some references ?

Thank you.

This is one that i've used before but you do have to have arcgis and
the noaa lidar handler to be able to use this method. In case you were
unaware, most raw LiDAR data includes building and other structures
that introduce alot of error unless that is what you are wanting to
model. You might want to check your datasource if this is going to be
a problem. Let me know if you don't have arc-gis I should have a few
links on my home computer i can send to you later that go over this a
little more in depth.

http://charlotte.utdallas.edu/mgis/prj_wrkshp/2003/Nicoara/gcn_website/Conve=
rt_lidar.htm

Hi,

Thanks for the answer. I need the mathematics behind it and I will
develop a software tool to accomplish this. I have the point cloud
(x,y,z everywhere) and I guess interpolation of these points to grid
form is required.